Uniform light generating system for testing an image-sensing device and method of using the same

Abstract

A uniform light generating system for testing an image-sensing device includes a light-generating unit, a light-transmitting unit, a light-diffusing unit, and a lens unit. The light-generating unit has a substrate and a plurality of light-emitting elements electrically disposed on the substrate. The light-transmitting unit has one side communicated with the light-generating unit for receiving and uniformizing light beams projected from the light-emitting elements. The light-diffusing unit has one side disposed on the other side of the light-transmitting unit for receiving and diffusing the light beams that have passed through the light-transmitting unit. The lens unit is disposed on the other side of the light-diffusing unit for transmitting the light beams that have passed through the light-diffusing unit to the image-sensing device.

1. A uniform light generating system for testing an image-sensing device, comprising:
 a light-generating unit having a substrate and a plurality of light-emitting elements electrically disposed on the substrate; 
 a light-transmitting unit having one side communicated with the light-generating unit for receiving and uniformizing light beams projected from the light-emitting elements; 
 a light-diffusing unit having one side disposed on the other side of the light-transmitting unit for receiving and diffusing the light beams that have passed through the light-transmitting unit; and 
 a lens unit disposed on the other side of the light-diffusing unit for transmitting the light beams that have passed through the light-diffusing unit to the image-sensing device, wherein the lens unit includes a lens set, a focus adjusting element for adjusting the focus of the lens set, and a depth-of-field adjusting element for adjusting the depth-of-field of the lens set. 
 
     
     
       2. The uniform light generating system as claimed in  claim 1 , wherein the light-emitting elements are composed of a plurality of LEDs. 
     
     
       3. The uniform light generating system as claimed in  claim 2 , wherein the LEDs are composed of a plurality of red LEDs, a plurality of green LEDs, and a plurality of blue LEDs. 
     
     
       4. The uniform light generating system as claimed in  claim 3 , wherein red light beams projected from the red LEDs, green light beams projected from the green LEDs and blue light beams projected from the blue LEDs are mixed in the light-transmitting unit. 
     
     
       5. The uniform light generating system as claimed in  claim 1 , wherein the light-transmitting unit has a main body, a channel passing through the main body, and a reflective coating layer coated on an inner surface of the channel. 
     
     
       6. The uniform light generating system as claimed in  claim 5 , wherein the light-generating unit and the light-diffusing unit are disposed on two opposite sides of the main body in order to seal two opposite sides of the channel. 
     
     
       7. The uniform light generating system as claimed in  claim 1 , wherein the light beams pass through the lens set for generating scattered light or parallel light by matching the focus adjusting element and the depth-of-field adjusting element. 
     
     
       8. The uniform light generating system as claimed in  claim 1 , further comprising a control unit electrically connected with the light-generating unit in order to adjust the brightness and the color temperature of the light beams. 
     
     
       9. The uniform light generating system as claimed in  claim 8 , further comprising a computer device electrically connected between the control unit and the image-sensing device. 
     
     
       10. A method of using a uniform light generating system for testing an image-sensing device, comprising:
 projecting light beams from a light-generating unit, wherein the light-generating unit has a substrate and a plurality of light-emitting elements electrically disposed on the substrate; 
 receiving and uniformizing the light beams projected from the light-emitting elements by a light-transmitting unit that has one side communicated with the light-generating unit; 
 receiving and diffusing the light beams that have passed through the light-transmitting unit by a light-diffusing unit that has one side disposed on the other side of the light-transmitting unit; 
 transmitting the light beams that have passed through the light-diffusing unit to the image-sensing device by a lens unit that is disposed on the other side of the light-diffusing unit; and 
 judging the image-sensing quality of the image-sensing device by a comparison between the measurement information of the light beams that have passed through the light-transmitting unit, the light-diffusing unit and lens unit with the original information of the light beams projected from the light-generating unit. 
 
     
     
       11. The method as claimed in  claim 10 , wherein the light-emitting elements are composed of a plurality of LEDs. 
     
     
       12. The method as claimed in  claim 11 , wherein the LEDs are composed of a plurality of red LEDs, a plurality of green LEDs, and a plurality of blue LEDs. 
     
     
       13. The method as claimed in  claim 12 , wherein red light beams projected from the red LEDs, green light beams projected from the green LEDs and blue light beams projected from the blue LEDs are mixed in the light-transmitting unit. 
     
     
       14. The method as claimed in  claim 10 , wherein the light-transmitting unit has a main body, a channel passing through the main body, and a reflective coating layer coated on an inner surface of the channel. 
     
     
       15. The method as claimed in  claim 14 , wherein the light-generating unit and the light-diffusing unit are disposed on two opposite sides of the main body in order to seal two opposite sides of the channel. 
     
     
       16. The method as claimed in  claim 10 , wherein the lens unit includes a lens set, a focus adjusting element for adjusting the focus of the lens set, and a depth-of-field adjusting element for adjusting the depth-of-field of the lens set. 
     
     
       17. The method as claimed in  claim 16 , wherein the light beams pass through the lens set for generating scattered light or parallel light by matching the focus adjusting element and the depth-of-field adjusting element. 
     
     
       18. The method as claimed in  claim 10 , wherein the uniform light generating system further comprises a control unit electrically connected with the light-generating unit in order to adjust the brightness and the color temperature of the light beams. 
     
     
       19. The method as claimed in  claim 18 , wherein the uniform light generating system further comprises a computer device electrically connected between the control unit and the image-sensing device in order to compare the measurement information with the original information for judging the image-sensing quality of the image-sensing device. 
     
     
       20. The method as claimed in  claim 10 , wherein the uniform light generating system further comprises a lux meter for measuring the light beams that have passed through the light-transmitting unit, the light-diffusing unit and lens unit in order to obtain a real lux value, and a lux value generated by the light-generating unit is corrected by comparing the lux value generated by the light-generating unit with the real lux value.